Brush



UNITED STATES PATENT OFFICE.

HERMAN OLSEN AND JOHN F. MILLER, OF CHICAGO, ILLINOIS.-

BRUSH.

SPECIFICATION forming part of Letters Patent'No. 509,237, dated November 21, 1893.

Application filed December 28. 1892. Serial No. 456,542. (No model.)

To a/ZZ whom it may concern.-

Beit known that we, HERMAN OLsEN and JOHN F. MILLER, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Brushes, as set forth in the accompanying drawings, forming a part of this specification, in which-` Figure 1, is a perspective view of a brush embodying our invention. Fig. 2, is a plan view of the saine showing the head in full lines at right angles to the handle, and showing by dotted lines the position assumed by said head when it is turned upon its pivotal point to bring said head in a line parallel with the handle.

Our invention relates to brushes generally, and particularly to that class used for the purpose of cleaning boilers of their incrustation and sedimentary deposits, and our invention consists of the construction and combination'of parts which we shall hereinafter Y fully describe and claim.

To enable others skilled in the artto which our invention appertainsto make and use the same we shall now describe its construction and indicate the manner in which the same is carried out.

In the employment of brushes for the cleaning of boilers, ues and like articles, great difliculty hasbeen experienced in reaching all surfaces of said articles owing to their concaved nature, and brushes with straight heads and Working faces have been found deficient for this class of work as they do not conform to the curvature of the boilers of steam engines or like articles, and therefore cannot closely operate against the inner walls of the same to remove the rust and incrustation, and loose sedimentary matter which settles upon its bottom. In our brush the head and working face are curved so that they correspond with the curved wall of the boiler and effectively remove the deposits thereon.

In practice the head of our brush will be of wood, although it may be of metal, and it is curved longitudinally whereby it presents a straight upper and lower surface a, a convex outer edge b, and a concave inner edge a', the form being essentially that shown in the drawing.

The working face of the brush is made of wires or metal bristles d suitably secured in the head, and their outer ends arranged in a curved line whereby said ends, which I term the working face proper, approximately conforms to the curvature of the boiler, and when drawn back and forth therein operates closely against its surface and loosens and removes its deposits. The head has its upper surface formed or provided with a raised surface or projection D havinga curved and open Wall e and within this projecting portion the handle E has its inner end inserted and pivotally held by a pin or bolt g, said pro jecting portion having also a hole h through which a set screwl is passed to engage the handle whereby the latter is rigidly held.

In Fig. 1 the head ofthe brush is shown at right angles to the handle, which, in its operative position and in Fig. 2, we show by dotted lines the position which it assumes when the set screw is released and the brush head is turned about its pivot to bring it about parallel with the handle so that it may be stored away in a small space, and especially so that it can be passed into the hand hole which is of dierent size in different make of boilers. It is evident that the curved working face will fit the curved interior Wall of the boiler, that the curved edge B will allow the working face of the brush to reach farther into a bulged head of a boiler than would a straight edge, because itis constructed to conform to the bulge in the boiler head, that the curved portion d will act in the manner of a scoop in drawing the scales and sediment out; and, Vin order to insert a large brush of this character into a given sized hand hole that the pivoted handle `is necessary.

A brush of this construction is simple in construction and cheaply made, and has been found very effective for the purposes before mentioned. f

Having thus described our invention 5 what its length parallel with said handle, substan- We claim as new, and desire to secure by Lettially as herein described.

ters Patent, is- HERMAN OLSEN.` An elongated brush head having a convex JOHN F. MILLER. 5 edge a', a convex Working face d, in oombi- Witnesses:

nation with a handle, pivoted to said head to KINTZELL ANDERSON,

allow said head to be Lurned in a direction of EDWARD M. SOAPES. 

